//========================================================================
//Copyright 2007-2010 David Yu dyuproject@gmail.com
//------------------------------------------------------------------------
//Licensed under the Apache License, Version 2.0 (the "License");
//you may not use this file except in compliance with the License.
//You may obtain a copy of the License at 
//http://www.apache.org/licenses/LICENSE-2.0
//Unless required by applicable law or agreed to in writing, software
//distributed under the License is distributed on an "AS IS" BASIS,
//WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//See the License for the specific language governing permissions and
//limitations under the License.
//========================================================================

package com.dyuproject.kvstore;

/**
 * TODO
 *
 * @author David Yu
 * @created Feb 2, 2010
 */
public abstract class Mutable<T>
{
    
    /**
     * Set the value.
     */
    public abstract void setValue(T value);

    
    /**
     * Get the value.
     */
    public abstract T getValue();
    
    
    /**
     * Returns a new mutable object from the given {@code value}.
     */
    public static <T> Mutable<T> create(T value)
    {
        return new Generic<T>(value);
    }
    
    /**
     * Returns a new mutable object.
     */
    public static <T> Mutable<T> create()
    {
        return new Generic<T>();
    }
    
    static final class Generic<T> extends Mutable<T>
    {
        
        private T value;
        
        Generic()
        {
            
        }
        
        Generic(T value)
        {
            this.value = value;
        }

        public T getValue()
        {
            return value;
        }

        public void setValue(T value)
        {
            this.value = value;
        }
        
    }


}
